Fix: EEVEE: Avoid Valgrind issues

Running valgrind on a render test exhibit a lot of warnings
about `Conditional jump or move depends on uninitialised value(s)`.

This patch makes sure to initialize the memory to avoid
platform dependent bugs.

Pull Request: https://projects.blender.org/blender/blender/pulls/144995

source/blender/draw/engines/eevee/eevee_ambient_occlusion.hh

@@ -28,7 +28,7 @@ class AmbientOcclusion {
  private:
   class Instance &inst_;
 
-  bool render_pass_enabled_;
+  bool render_pass_enabled_ = false;
   int ray_count_ = 0;
   int step_count_ = 0;
 

source/blender/draw/engines/eevee/eevee_camera.hh

@@ -105,7 +105,7 @@ class Camera {
     float radius;
   } bound_sphere;
 
-  float overscan_;
+  float overscan_ = -1.0f;
   bool overscan_changed_;
   /** Whether or not the camera was synced from a camera object. */
   bool is_camera_object_ = false;

source/blender/draw/engines/eevee/eevee_film.hh

@@ -70,7 +70,7 @@ class Film {
   gpu::Texture *combined_final_tx_ = nullptr;
 
   /** Are we using the compute shader/pipeline. */
-  bool use_compute_;
+  bool use_compute_ = false;
 
   /** Copy of v3d->shading properties used to detect viewport settings update. */
   eViewLayerEEVEEPassType ui_render_pass_ = eViewLayerEEVEEPassType(0);
@@ -96,7 +96,7 @@ class Film {
   PassSimple cryptomatte_post_ps_ = {"Film.Cryptomatte.Post"};
 
   FilmData &data_;
-  int2 display_extent;
+  int2 display_extent = int2(-1);
 
   eViewLayerEEVEEPassType enabled_passes_ = eViewLayerEEVEEPassType(0);
   /* Store the pass types needed by the viewport compositor separately, because some passes might

source/blender/draw/engines/eevee/eevee_instance.cc

@@ -272,9 +272,12 @@ void Instance::init_light_bake(Depsgraph *depsgraph, draw::Manager *manager)
   rcti empty_rect{0, 0, 0, 0};
   film.init(int2(1), &empty_rect);
   render_buffers.init();
+  ambient_occlusion.init();
   velocity.init();
+  raytracing.init();
   depth_of_field.init();
   shadows.init();
+  motion_blur.init();
   main_view.init();
   light_probes.init();
   planar_probes.init();

source/blender/draw/engines/eevee/eevee_instance.hh

@@ -55,7 +55,7 @@ namespace blender::eevee {
 
 /* Combines data from several modules to avoid wasting binding slots. */
 struct UniformDataModule {
-  UniformDataBuf data;
+  UniformDataBuf data = {"UniformDataBuf"};
 
   void push_update()
   {

source/blender/draw/engines/eevee/eevee_sampling.hh

@@ -63,7 +63,7 @@ class Sampling {
    */
   static constexpr int interactive_mode_threshold = 3;
 
-  SamplingDataBuf data_;
+  SamplingDataBuf data_ = {"SamplingDataBuf"};
 
   ClampData &clamp_data_;
 

source/blender/draw/engines/eevee/eevee_shadow.hh

@@ -76,10 +76,10 @@ struct ShadowTileMap : public ShadowTileMapData {
   /** Cube face index. */
   eCubeFace cubeface = Z_NEG;
   /** Cached, used for detecting updates. */
-  float4x4 object_mat;
+  float4x4 object_mat = float4x4::identity();
 
  public:
-  ShadowTileMap(int tiles_index_)
+  ShadowTileMap(int tiles_index_) : ShadowTileMapData{}
   {
     tiles_index = tiles_index_;
     /* For now just the same index. */

source/blender/draw/intern/DRW_gpu_wrapper.hh

@@ -303,7 +303,7 @@ template<
     /* bool device_only = false */>
 class UniformBuffer : public T, public detail::UniformCommon<T, 1, false> {
  public:
-  UniformBuffer(const char *name = nullptr) : detail::UniformCommon<T, 1, false>(name)
+  UniformBuffer(const char *name = nullptr) : T{}, detail::UniformCommon<T, 1, false>(name)
   {
     /* TODO(@fclem): How could we map this? */
     this->data_ = static_cast<T *>(this);
@@ -496,7 +496,7 @@ template<
     bool device_only = false>
 class StorageBuffer : public T, public detail::StorageCommon<T, 1, device_only> {
  public:
-  StorageBuffer(const char *name = nullptr) : detail::StorageCommon<T, 1, device_only>(name)
+  StorageBuffer(const char *name = nullptr) : T{}, detail::StorageCommon<T, 1, device_only>(name)
   {
     /* TODO(@fclem): How could we map this? */
     this->data_ = static_cast<T *>(this);

source/blender/gpu/intern/gpu_capabilities.cc

@@ -19,7 +19,7 @@
 
 namespace blender::gpu {
 
-GPUCapabilities GCaps;
+GPUCapabilities GCaps = {};
 
 }
 

source/blender/gpu/intern/gpu_storage_buffer_private.hh

@@ -28,11 +28,11 @@ class VertBuf;
 class StorageBuf {
  protected:
   /** Data size in bytes. Doesn't need to match actual allocation size due to alignment rules. */
-  size_t size_in_bytes_;
+  size_t size_in_bytes_ = -1;
   /** Continuous memory block to copy to GPU. This data is owned by the StorageBuf. */
   void *data_ = nullptr;
   /** Debugging name */
-  char name_[DEBUG_NAME_LEN];
+  char name_[DEBUG_NAME_LEN] = {};
 
  public:
   StorageBuf(size_t size, const char *name);

source/blender/gpu/opengl/gl_storage_buffer.hh

@@ -10,6 +10,8 @@
 
 #include "MEM_guardedalloc.h"
 
+#include "GPU_vertex_buffer.hh"
+
 #include "gpu_storage_buffer_private.hh"
 
 namespace blender {
@@ -25,7 +27,7 @@ class GLStorageBuf : public StorageBuf {
   /** OpenGL Object handle. */
   GLuint ssbo_id_ = 0;
   /** Usage type. */
-  GPUUsageType usage_;
+  GPUUsageType usage_ = GPUUsageType(-1);
   /* Read */
   GLuint read_ssbo_id_ = 0;
   GLsync read_fence_ = 0;